Improvement in sake-ovens



Bkers Oven. 1 v,11111. 103,086. y Patemedoct;11,1810.

` hearth.

' N 'iittli "lf @aient imi ADAM A. AULL AND JOHN A. AULL.V OF BELLEFONATAINE, OHIO.

`Letters Patent NO.1U`8,086, dated October 11, 1870. I p

IMPROVEMENT IN BAKE-ovENs.

The Schedule referred to iu these Letters Patentfand naalxing pfbof the same.

Taal!` whlcmz't 'mayconcern: A `Be it `known that we, ADA-M Ar-AULL and- J OHN A. AULL, of Bellt'ontaine, in thc county of Logan and State of Ohio, .haveinvented a new andimprovcd horizontal `plane justa-beve the hearth.

fll'igure Sis a section taken vertically andlongitud-v inally t-hro'ugh the'oren, in the direction indicated by the course of dotted lince@ n iig. 2.

Similar letters "of reference indicate corresponding vparts in the several'tgurcs. l

Thisinventicn relates to certain improvements o'u A ovens designed for `general baking purposes.

It consists .A Firstin arranging, at opposite ends .ot'. the hearth, within the walls ofA .the oven,l two furnaces, one' of which-is below the(` heartl1,'aud adapted for coke orv i hard` coal, and the other is` located above the hearth,

or bctweeu'the latterand the crown of the Aoven,A-and A is adapted for either coke, coal, or wood, thereby oh- A `taining a more uniform heatthrough'out the oren than lis obtaiu'ediu ovens hitherto made.

Second, in :constructing the hearth-` of the oven partly of soapstoiie'andpartly of `iron grating, which will allowan equal distribution of heat throughout all parts of the oven, as willbe hereinafter explained. l To enable others skilled in" thcta'rt` to understand our invention, wcwill expluinsits4 construction and operation... l l A A A 1n theaccolnpanying drawing- A Arcprescnts the verticaljwalls -of an oblong-rectangular oven, ofgwhich` A is the basaand D the arch or crown.` A

In front-.Of lthe oven are l sliding doors, a a, which are used for closing the passages b b leading to the This hearth, which isr sustained in a horizontal position in any convenient manner,is elevated some'- `what from thefoundation'rA, so as to' leave a i'ee circulatingspace, M,'shown in fig. '3, for allowingthe theat freeaccess to the bottom ot' the heart-h.

`The hearth is Vcomposed of a central slab or slabs, G, of soapstonc, 'surrounded on three sides by grat- Ain J. A A

'flhe grating-is at the ends Vand rear part of the Aimpertbrated 'portion G Tof the hearth, and causes a` free circulation of VAthe heated products from a furnace, N. beneath everypart of this portion Gr.l A

Above the hearth is the crown of the 'fui-nace, out

Aof which is carried a pipe, G, provided with a valve,

c', which caube operated by Va rod, c, leading to the front wall of the oven. rlAhe pipe aibrds an escape for steam`fiom'the oven to one ot' the main tl'ues.

At one end of the o ren, and below:v the hearth, a furnace, N, is "coustruclaed,l piovidedwith perforated side mus P1 i* feeddoor, c, and an ash-pit', N', which j `also hasa door, e'. A v Y A At this end of the oven' is also constructed an escape-flue, B", leading Ato a chimney, B.

. At the oppositeend of `the oven,fand near one corner thereo'isia furnace, L, which is between thehearthandthe crown D ofthe oven. .A l This furnace is provided with a feeddoor, l, au ashlpit, iL', which latter has a door, l'."

On one side or infront of the furnace: L is a due, B", leading to a cl1irnney,-B".

It willthus he seen that we employ two separate furnaces fcrsupplying heat above and below thefhcarth' to the interiorof' the oven, vand that these furnaces are arranged in suchluaunerjas to supply heat :from both endsl of the oren, thereby uniformly economically heating it throughout. v

Having described our invention,

What we claim as new, anddesire to secureby Let ters Patent, is- A l AA 1.' ".lhe arrangement of two furnaces or tire-places at opposite ends of the oven, one furnacebemg located Abelow the hearth and the otherahove it,suhstantially as described. J A i A 2. The construction of ahearth, of 'a soapstone nnperforated portion, G,'a`.nd a grating portion J, substantially as described.

` ADAM A. AULL.

JGHN A. AULL Witnesses :A ROBT. P. KENNEDY, S. 511.4133. 

